Sharding is a data tier architecture in which data is horizontally partitioned across independent databases.

This chapter describes UCP Shared Pool for sharded databases in the following sections:

• Overview of UCP Shared Pool for Database Sharding
• About Handing Connection Requests for a Sharded Database
• Sharding Data Source for Transparent Access to Sharded Databases
• Middle-Tier Routing Using UCP
• Sharding with JTA/XA Transaction in WebLogic Server